John m



J. M. HOLT. Injector for Steam Boilers.

(No Model.)

lemme@l June 2s, |1881.

IN NTOR A TTDRNEYS.

N. PETERS, Phwxo-Lnhegmymr. wazhmgum. n. C.

UNITED STATES PATENT OFFICE.

JO'HNM.- HOLT, OE GEEENsBOEOUeH, Nyo., AssieNOE OE ONE-HALE To WM. B. EAEEAR AND GEORGE s. sEReEANT, OE SAME PLACE.

nINJEGTOR FOR STEAM-BOILERS.

SPECIFICATION forming part of Letters Patent No. 243,560, dated June 28, 1881.

Applicationled May 6, 1881. (No model.)

convenient means of indicating instantly to the eye or ear the condition of the injector when in operation, and at the same time to utilize the Water that escapes at the wastepipe of the injector for washing out the ashpan of the furnace.

In the accompanying drawings, Figure 1 represents a sectional view of an injector with my improvements attached; Fig. 2, a detail view; and Fig. 3, aside elevation of`a locomotive, showing the connection of the wastepipe of an injector with the ash-pan.

As heretofore constructed, injectors for steam-boilers have been without a convenient means of indicating instantly any irregularity of operation. It frequently happens, from one cause or another, that the continuity of thejet of water is broken before it reaches the delivery-tube, and, the check-valve consequently becoming closed, the supply of water to the boiler is shut off. In this event, for want of proper suction, the water is no longer lifted from the reservoir, and the steam collects in the combining chamber or tube, and also in the supply-pipe, so that in a very few moments the parts become unduly heated and have to be cooled before the normal action ot' the injector can be restored. The only methods heretofore used of determinin g such acondition ofthe injector are by applying the hand to the possibly heated portion, or by testing the quantity of water in the boiler, both of which require more or less time, during which the heating of the said parts increases'. lt is evident, therefore, that if the irregularity should be indicated instantly at its inception it could be corrected in time to prevent the above-mentioned difculty.

To accomplish this object I construct the water-supply pipe A of the injector B with a pipe, C, leading to the cab of a locomotive or to any position occupied by an engineer. This pipe C may be connected to the supply-pipe at any desired position, the object being to allow either water or steam to escape through itwhen connection with the boiler through the delivery-pipe is broken oii'. The free or outer end of pipe C is provided with a suitable bellringing valve to exclude the outer atmosphere, and a cap for guiding the escaping water downward into a receiver. v

Any form of valve or any number of valves desirable may be used, and for indicating the escape of steam a suitable whistle may be combined with the apparatus.

The injector being thus constructed, as soon as the jet is broken and the suction necessary to lift the water is discontinued the condensation of the steam ceases, and its accumulation in the combining-tube instantly forces the water up tube or pipe C, by which it escapes and at once gives the desired warning; The irregularity may then be instantly corrected by openin g the valve of the waste-pipe P until the flow of the Water is renewed. lAs the warning is given instantly upon the beginning of the irregularity', and the latter may be instantly corrected, the hea ting ofthe apparatus by the accumulation of steam is thus effectually prevented.

The waste-pipe P of the injector is provided with a pipe, P', which extends to the ash-pan of a locomotive or engine, for the purpose of conducting the waste water thereto, for extinguishing cinders and removing the ashes from the pan. As usually constructed, the wastepipe is placed Where the engineer can readily see it, in order to ascertain whether the flow of water is established before closing the valve of the Waste-pipe; but by my improvement the use of this pipe as an indicator becomes unnecessary, and it may therefore be used for the purpose above mentioned, in addition to its use for establishing the required ow or jet.

At any convenient position between the signal-valves and the injector a suitable cut-oft" may be provided for use in case said valves should need repairing.

Having thus described my invention, Whatl 2. The combination, with the waste-pipe of claim as new, and desire to secure by Letters an injector, ofthe pipe P', leading to the ash- Patent, is pan of an engine, substantially as shown and l. In combination with the Witter-supply described, whereby the Waste Water may be 5 pipe of an injector, the pipe C, leading to the utilized for extinguishing einders and remov- 15 cngneers cab, and having a suitable bell or ing ashes from the pain, as set forth.

Whistle, substantially as shown and described, J. M. HOLT. whereby the condition of the injector may be Witnesses: indicated instantly to the ear or eye, as set F. L. HOLLAND,

1o forth. B. E. SERGEANT. 

